Improvement in cri mping-machines for boots and shoes



J. S. PERKINS. Crimping Machine for Boots and Shoes.

No.206J95. Patented July 23,1878.

NITED STATES PATENT ()FFICE.

JOHN S. PERKINS, OF \VORCES'IIIB, MACS.HI'SIITTS.

IMPROVEMENT IN CRlMPlNG-MACHINES FOR BOOTS AND SHOES.

Specification forming part of Letters Patent No. 206,195, dated July22!, 1 7*; application tiled May 25, 1978.

To all trhom it may concera:

Be it known that I, JOHN S. PERKINS, of WVorcester, in the county oflVorcester and State of Massachusetts, have invented certainImprovements in Jaws for Crimping Boots and Shoes, of which thefollowing is a specification My invention consists in constructing thejaws with an inwardly-projecting flange, or with a flange and lugs onits face, for the purpose of securing or holding in place a wood lining.

It further consists in providing the clamp ing-bolt with sphericalbearings, to enable the jaws to move with ease in any direction toantomatically adjust themselves to articles being erimped, all ashereinafter more fully de scribed.

Figure 1 is a face view of one. of the jaws. Fig. 2 is a transversesection on the line w x of Fig. 1 5 and Fig. 3 is a perspective view ofa portion of a jaw, showing the bolt-head and its socket.

Heretofore crimping-jaws have been made of metal, and also of metalcovered 011 their face with leather, wood, and other material. Whencovered or lined with wood, it has usually been done by taking a thinpiece of wood and securing it to the face of the jaw by bolts, screws,or similar means, with the grain of the wood arranged parallel with theface of the jaw. In some cases, however, the wood has been cut acrossthe grain in a thin sheet, and then secured to the face of the jaw insuch a manner as to present the end of the grain to the leather to beerimped, which latter is the plan I prefer to use. \Vhen wood is used itis customary to protect its upper edge from wear by facing it with anarrow strip of thin metal, which has to be let into the wood so as tobe flush with the face thereof, and to which it is secured by screws orrivets.

I11 making my improved jaws, I make the metal jaw A with an inwardlyprojecting flange, B, around the upper edges, as shown in Fig. 1, andwith lugs e on its face at the point where the lower edge of the woodlining comes when in place. This is most conveniently done by castingthe jaw with the flange and lugs all in one continuous piece, though itis obvious that either or both the flange and lugs may be made separate,and afterward secured to the jaw, if desired. I then provide a piece ofwood, C, of athickness equal to the depth of the flange B, of therequired size and shape to fit in between the flange and the lugs e, asshown in Figs. 1 and 2. This wood lining is cut across the grain, sothat when inserted it will present the end of the grain to the leatherto be erimped, the grain of the wood running at right angles to the faceof the jaw. ly thus fitting it in while the wood is dry, it will be seenthat when wet, as it necessarily is while crimping boots or shoes, theswelling of the wood lining only serves to make it crowd against theflange and the lugs, thereby holding it securely and firmly in place. Ifdesired, screws or nails may be inserted through holes in the flangeinto the wood lining, to prevent it from being displaced in case itshould become loose by subsequent shrinkage when standing forconsiderable time without use; and, if desired, the lugs or the flange,or both, may be slightly undercut or beveled inward, so as to lock overthe edge of the wood for the same purpose, the wood being forced intight while dry.

By these means the wood lining can be secured without having any nails,screws, or rivets on any portion of its face, thus presenting to theleather a smooth unbroken surface of wood. At the same time the flangeB, coming flush with the inner face of the lining C, or nearly so,protects it from wear at that point as effectually as did the metalstrip formerly secured to the face of the wood.

It is obvious that, if desired, the flange and lugs may be united, orthat the flange may be made continuous all around the edges of the wood,if preferred but I prefer the plan shown.

As the leather to be erimped varies in thickness more or less on thefoot and leg portions of the upper, it is desirable to have the jaws andtheir clamping-bolt so constructed as to permit the jaws to adapt oradjust themselves to the varying thicknesses; and to accomplish thisresult I make a boss, 11, on the outer face of each jaw, around thebolt-hole, as shown in Fig. 2, the mouth of the hole in this boss beingmade concave or hemispherical, as shown in said figure.

In order to keep the bolt I) from turning when the crank I is turned, Iprovide the bolt with a T-shaped head, (1, which is rounded on itsbearing-surface, and which fits in a correspondingly shaped notch, 1,formed in the boss n on one jaw, the hole in the jaw being somewhatlarger than the body of the bolt, as shown in Fig. 2, thus leaving thejaw free to tip or adjust itself on the rounded bearingsurface of thehead a, this adjustment, of course, being in a plane at right angle tothe axis of the bolt-head. ()n the opposite side I slip onto the bolt awasher, b, the bearing-face of which is made hemispherical to fit theconcave socket made for it in the outer face of the jaw, as shown inFig. 2, and then apply the crank I, having: a screw thrcad in its hub,in the usual manner, though, if preferred, the separate washer I: may bedispensed with by making the hub itself of the requisite form to tit theconcave socket.

It will be seen that by this means the righthand jaw is free to adjustitself or tip in any and all directions, and thus to adjust itself tothe article being erimpcd perfectly, it working, in connection with thespherical washer or nut, on the principle of the ball-and-socket joint.

It is obvious that this form of hearingmay be applied to both jaws; butit so, then other means must be used to hold the bolt D from turning;and inasmuch as its application to the one jaw answers every purpose, Iprefer to make the parts as above described.

Having thus described my invention, what I claim is-- 1. A crimping-jaw,A, provided with an inwardly-projecting flange, or flange and lugs,arranged to hold the wood lining (J in place and protect its edge fromwear, substantially as described.

2. The combination, with a pair of crimpingjaws, of a cla1nping-bolt,l),provided with the hemispherical bearings at one or both sides,substantial! as herein set, forth.

JOHN S. PERKINS.

\\'itnesses:

ll. Tnonrsox,

(Harmon It. BALL.

